Still needs some follow up from reviews #2298 (review) and
#2298 (review). Namely:

• Address the XXX/TODO in that PR
• Fix tmlibs->libs
• Add an ADR
• Update ABCI and other docs
• Update changelog
• Update code comments as noted in PR review
• Address other questions/comments in the PR review
• Address Anton's review

Also see the request for clarifications in #2527